fix: not creating language mappings table due to broken type definition in users model (resolve #69)

chore: introduce foreign key constraints

models/alias.go

@@ -3,6 +3,7 @@ package models
 type Alias struct {
 	ID     uint   `gorm:"primary_key"`
 	Type   uint8  `gorm:"not null; index:idx_alias_type_key"`
+	User   *User  `json:"-" gorm:"not null"`
 	UserID string `gorm:"not null; index:idx_alias_user"`
 	Key    string `gorm:"not null; index:idx_alias_type_key"`
 	Value  string `gorm:"not null"`